Apparently I just blew something in the crossover in my original amazing speakers. (upgraded with the 60" ribbons) I heard a pop, then some smoke. As a result the bottom woofer is no longer working. Here is a picture of the crossover. How can I tell if its the crossover or the woofer? Was the crossover upgraded when the 60" ribbon was installed? Can anyone tell by looking at the crossover?

Visually I don't see a problem with the crossover, but looking at your picture is not the same as seeing it in person. A pop and smoke would generally indicate a capacitor going bad, although I suppose you could have blown the single woofer. Can you see anything on the board that looks black and charred? Can you locate where the smell is coming from? Does the bottom woofer move in and out freely? If you have a meter, desolder the two leads to the bottom woofer and check the resistance, it should be 3.5 ohms.

Was the crossover upgraded when the 60" ribbon was installed?

From what I can make out, it would appear that the high frequency section has been changed to accommodate the 60" ribbon.

Political Correctness...defined

A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

In a recent press conference, President Obama remarked, "If I had a city, it would look just like Detroit."

The woofer moves freely, does not appear to be a problem with it. I can't smell any burn nor do i see any on the crossover. Everything appears to be fine but the bottom woofer still does not work. I saw the smoke in the crossover area when it popped. So you do think the crossover was changed when the ribbons were? With caps, etc. so old would it help to have them rebuilt? It seems the speakers still need an enormous amount of power.

Not the entire crossover, just the high frequency circuit and yes it would have to be changed in order for the new ribbons to work.

With caps, etc. so old would it help to have them rebuilt? It seems the speakers still need an enormous amount of power.

Replacing the original crappy caps with high quality film and foil caps would be an excellent idea. Changing the resistors would be too except that none of the better ones come in the required 25 watt rating, at least they didn't years ago when I looked into it. None of that is going to change the fact that they are a bitch to power.

Political Correctness...defined

A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.

In a recent press conference, President Obama remarked, "If I had a city, it would look just like Detroit."